Networking xp to xp

My wifes pc was networked with all the others in my house, then all the sudden it wont see other pcs and other pcs wont see her's hers is wireless, it still does connect to the wireless router, i have tryed the network wizard, changing pcs name, reinstalling wireless card drivers making sure sharing files is enabled. i am losed as to what else i should try, thank you

What are the IP addresses of each computer?

It almost sounds as if the wireless router got set to default and is using NAT. This would put the two computers on different subnets.

I found the problem, i was using a wireless router and a splice , cuz the cable wasnt long enough, so i just replaced with a longer cable, and all is good, than you was trying to take the easy way out.

Glad it was something easy.